pair,contact1,contact2,flow1,flow2 1x4u_A_,18,39,1,1 1x4u_A_,25,27,1,1 1x4u_A_,29,31,1,1 1x4u_A_,31,40,1,1 1x4u_A_,33,38,1,1 1x4u_A_,41,45,1,1 1x4u_A_,44,70,1,1 1x4u_A_,47,68,1,1 1x4u_A_,49,66,1,1 1x4u_A_,51,54,1,1 1x4u_A_,58,62,1,1 1x4u_A_,69,72,1,1 1x4u_A_,69,73,1,1 1x4u_A_,70,74,1,1 1x4u_A_,72,76,1,1 1x4u_A_,73,77,1,1 1x4u_A_,74,78,1,1 1x4u_A_,78,79,1,1